4.3BSD - /usr/src/new/X/Xlib/XStringWidth.c

   1: #include <X/mit-copyright.h>
   2: 
   3: /* $Header: XStringWidth.c,v 10.4 86/02/01 15:40:32 tony Rel $ */
   4: /* Copyright Massachusetts Institute of Technology 1985 */
   5: 
   6: #include "XlibInternal.h"
   7: int XStringWidth (string, info, charpad, spacepad)
   8:     register char *string;
   9:     register FontInfo *info;
  10:     register int charpad, spacepad;
  11:     {
  12:     register int result = 0;
  13:     if (!*string)  /* zero length string */
  14:         return (0);
  15: 
  16:     if (info->fixedwidth) {
  17:     int length = strlen (string);
  18:     result = length * (info->width + charpad) - charpad;
  19:            /* don't pad last character */
  20:     if (spacepad) {
  21:         char *sub = string, *index();
  22:         while (sub = index (sub, ' ')) {
  23:             result += spacepad;
  24:         sub++;
  25:             }
  26:             if (string[length-1] == ' ')
  27:             result -= spacepad;
  28:             /* don't pad terminating space character */
  29:         }
  30:     }
  31: 
  32:     else {   /* variable width font */
  33:     unsigned char c;
  34:     register short *widths = info->widths - info->firstchar;
  35:     while (c = *(string++)) {
  36:         if ((c >= info->firstchar) && (c <= info->lastchar))
  37:             result += (widths[c] + charpad);
  38:         if (c == ' ')
  39:             result += spacepad;
  40:         }
  41:     result -= charpad;  /* don't pad last character */
  42:     if (*(string-1) == ' ')
  43:         result -= spacepad;
  44:         /* don't pad terminating space character */
  45:     }
  46: 
  47:     return (result);
  48:     }

Defined functions